SOLUTION: how to find the domain of f (x) = ln(x + sqrt(x^2 −9)) Thank you

Algebra ->  Finance -> SOLUTION: how to find the domain of f (x) = ln(x + sqrt(x^2 −9)) Thank you      Log On


   

Question 1005768: how to find the domain of f (x) = ln(x + sqrt(x^2 −9))

Thank you
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Some help to start:
x%2Bsqrt%28x%5E2-9%29%3E0 and sqrt%28x%5E2-9%29%3E=0; The square root also requires x%3E=3, the most important part of establishing the domain.

If you could use graphing device to avoid the algebra, then
graph%28300%2C300%2C-6%2C6%2C-10%2C10%2Cln%28x%2Bsqrt%28x%5E2-9%29%29%29